Average female lice per fish

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Salmon Scotland mortality

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Inspection reports

Case Number: 2022-0037

Download Fish came on from Yetts O' Muckart in October 2021 and have been doing well since the transfer. Company vet visited the site in November and December for post-transfer health checks and reported that the fish were in good physical condition and demonstrated an excellent feeding response. Gills were also in good health.
Site is used as a nursery site where fish can be on-grown before transfer to other sea sites where they are grown to harvest size.
No disease issues on site, but site manager has reported an increase in the observation of lice on the site. Fish were treated with Slice and Salmosan in January 22 to reduce loads. Site manager reported that both treatments had good clearance rates, but expected further treatments would be necessary throughout the cycle to maintain low levels.
Seals and cormorants are present in high numbers in the vicinity around the site. Cages are equipped with sapphire nets and tensioned top nets to deter predators.
FMA is not fallowed synchronously on a single year class basis, however there is a risk assesment in place for this which was inspected and found to be satisfactory.
Fish were sitting deep in the water so were difficult to observe. A handful of moribunds were observed across the site but didn’t display any clinical signs of disease so were not sampled for diagnostics. 2 mortalities were also noted across the site. The population of fish in the cages otherwise appeared healthy and in good condition.
Fish sampled for VMD appeared healthy externally and internally and demonstrated a good feed response. [Original PDF]

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